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Diff Utils library is an OpenSource library for performing the comparison operations between texts: computing diffs, applying patches, generating unified diffs or parsing them, generating diff output for easy future displaying (like side-by-side view) and so on.

Main reason to build this library was the lack of easy-to-use libraries with all the usual stuff you need while working with diff files. Originally it was inspired by JRCS library and it's nice design of diff module.

**This is originally a fork of java-diff-utils from Google Code Archive.**

Look[here](https://github.com/wumpz/java-diff-utils/wiki) to find more helpful informations and examples.

Look[here](https://github.com/wumpz/java-diff-utils/wiki) to find more helpful informations and examples.

These two outputs are generated using this java-diff-utils. The source code can also be found at the*Examples* page:

**Producing a one liner including all difference information.**

This is a test~senctence~**for diffutils**.

**Producing a side by side view of computed differences.**

|original|new|

|This is the second line.|This is the second line.|

|~And here is the finish.~||

* computing the difference between two texts.

* capable to hand more than plain ascci. Arrays or List of any type that implements hashCode() and equals() correctly can be subject to differencing using this library

* patch and unpatch the text with the given patch

* parsing the unified diff format

* producing human-readable differences

* inline difference construction

* Algorithms:

* Myer

* HistogramDiff using JGit Library

* computing the difference between two texts.

* capable to hand more than plain ascci. Arrays or List of any type that implements hashCode() and equals() correctly can be subject to differencing using this library

* patch and unpatch the text with the given patch

* parsing the unified diff format

* producing human-readable differences

* inline difference construction

* Algorithms:

* Myer

* HistogramDiff using JGit Library

* Myer's diff

* HistogramDiff

* HistogramDiff

But it can easily replaced by any other which is better for handing your texts. I have plan to add implementation of some in future.

publicstatic<T>Patch<T> diff(List<T> original,List<T> revised,

BiPredicate<T,T> equalizer) throwsDiffException {

if (equalizer!=null) {

returnDiffUtils.diff(original, revised,

newMyersDiff<>(equalizer));

}

returnDiffUtils.diff(original, revised,newMyersDiff<>());

BiPredicate<T,T> equalizer) throwsDiffException {

if (equalizer!=null) {

returnDiffUtils.diff(original, revised,

newMyersDiff<>(equalizer));

}

returnDiffUtils.diff(original, revised,newMyersDiff<>());

}

This is a valid piece of source code:

* blocks without braces are not allowed

* after control statements (if, while, for) a whitespace is expected

* the opening brace should be in the same line as the control statement

Just add the code below to your maven dependencies:

<dependency>

<groupId>io.github.java-diff-utils</groupId>

<artifactId>java-diff-utils</artifactId>

Attention. We changed groupid and artifactid. Starting with version 4 you have to use:

<dependency>

<groupId>io.github.java-diff-utils</groupId>

<artifactId>java-diff-utils</artifactId>

or using gradle: